GB1301337A - - Google Patents

Info

Publication number
GB1301337A
GB1301337A GB1301337DA GB1301337A GB 1301337 A GB1301337 A GB 1301337A GB 1301337D A GB1301337D A GB 1301337DA GB 1301337 A GB1301337 A GB 1301337A
Authority
GB
United Kingdom
Prior art keywords
amplitude
phase
circuit
bits
groups
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Inventor
R G Ragsdale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INT COMMUNICATIONS CORP
Original Assignee
INT COMMUNICATIONS CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25370910&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB1301337(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by INT COMMUNICATIONS CORP filed Critical INT COMMUNICATIONS CORP
Publication of GB1301337A publication Critical patent/GB1301337A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/389—Demodulator circuits; Receiver circuits with separate demodulation for the phase and amplitude components

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB1301337D 1969-11-18 1970-10-13 Expired GB1301337A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87788069A 1969-11-18 1969-11-18

Publications (1)

Publication Number Publication Date
GB1301337A true GB1301337A (enrdf_load_stackoverflow) 1972-12-29

Family

ID=25370910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1301337D Expired GB1301337A (enrdf_load_stackoverflow) 1969-11-18 1970-10-13

Country Status (7)

Country Link
US (1) US3619503A (enrdf_load_stackoverflow)
CA (1) CA920239A (enrdf_load_stackoverflow)
CH (1) CH521693A (enrdf_load_stackoverflow)
DE (1) DE2056670B2 (enrdf_load_stackoverflow)
FR (1) FR2074929A5 (enrdf_load_stackoverflow)
GB (1) GB1301337A (enrdf_load_stackoverflow)
SE (1) SE375897B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163321A (en) * 1981-12-28 1986-02-19 Lmt Radio Professionelle Interrogation signals

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33056E (en) * 1971-09-14 1989-09-12 Codex Corporation Signal structures for double side band-quadrature carrier modulation
US3887768A (en) * 1971-09-14 1975-06-03 Codex Corp Signal structures for double side band-quadrature carrier modulation
US3988540A (en) * 1972-05-05 1976-10-26 Milgo Electronic Corporation Integrated circuit modem with a memory storage device for generating a modulated carrier signal
US3749843A (en) * 1972-05-08 1973-07-31 Bell Telephone Labor Inc Digital amplitude modulator
US3787785A (en) * 1972-05-15 1974-01-22 Collins Radio Co Phase representative digital signal modulating apparatus
FR2191796A5 (enrdf_load_stackoverflow) * 1972-06-26 1974-02-01 Sagem
US3818346A (en) * 1972-10-12 1974-06-18 J Fletcher Differential phase-shift-keyed signal resolver
US3943285A (en) * 1973-05-10 1976-03-09 Milgo Electronic Corporation Multiplexed data modem
DE2324542C3 (de) * 1973-05-15 1979-01-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur frequenzdifferenziellen Phasenmodulation
US4217467A (en) * 1974-07-19 1980-08-12 Nippon Telegraph & Telephone Public Corporation Amplitude and periodic phase modulation transmission system
GB1519972A (en) * 1974-07-19 1978-08-02 Nippon Telegraph & Telephone Data transmission system
US3955141A (en) * 1974-10-18 1976-05-04 Intertel, Inc. Synchronizing circuit for modems in a data communications network
US4121050A (en) * 1977-02-02 1978-10-17 The United States Of America As Represented By The Secretary Of The Air Force Differential tri-phase shift keyed modulation
US4161628A (en) * 1978-01-31 1979-07-17 Harris Corporation Technique for tracking amplitude fades for multi-amplitude signalling
US4290140A (en) * 1978-02-23 1981-09-15 Northrop Corporation Combined coherent frequency and phase shift keying modulation system
US4170764A (en) * 1978-03-06 1979-10-09 Bell Telephone Laboratories, Incorporated Amplitude and frequency modulation system
US4355402A (en) * 1978-10-19 1982-10-19 Racal-Milgo, Inc. Data modem false equilibrium circuit
US4381560A (en) * 1980-10-24 1983-04-26 Bell Telephone Laboratories, Incorporated Multiplex transmitter apparatus
US4382297A (en) * 1980-10-24 1983-05-03 Bell Telephone Laboratories, Incorporated Demultiplex receiver apparatus
US4494239A (en) * 1982-05-26 1985-01-15 At&T Bell Laboratories Frame synchronization and phase ambiguity resolution in QAM transmission systems
FR2536610A1 (fr) * 1982-11-23 1984-05-25 Cit Alcatel Equipement de transmission synchrone de donnees
DE3243373A1 (de) * 1982-11-24 1984-07-26 ANT Nachrichtentechnik GmbH, 7150 Backnang Phasenumtastungs/amplitudenumtastungs (psk/ask)-system mit beliebiger stufenzahl
US4573166A (en) * 1983-06-24 1986-02-25 Wolfdata, Inc. Digital modem with plural microprocessors
FR2572603B1 (fr) * 1984-10-30 1989-11-17 Lignes Telegraph Telephon Demodulateur differentiel de signaux electriques a plusieurs etats d'amplitude et de phase pour equipements de transmission de donnees
US5555277A (en) * 1993-12-01 1996-09-10 Datapoint Corporation Technique for cancelling common mode switching noise to achieve reduced error rates in a local area network
FR2731572B1 (fr) * 1995-03-10 1997-06-27 France Telecom Signal module en phase et portant une surmodulation hierarchique, dispositif d'emission et recepteurs correspondants
US5796784A (en) * 1996-03-27 1998-08-18 Motorola, Inc. Method and apparatus for modifying amplitude of at least one symbol
FR2807252B1 (fr) * 2000-03-31 2003-01-10 Matra Nortel Communications Dispositif de production d'un signal radiofrequence module en phase et en amplitude
EP1402645A4 (en) * 2001-05-03 2006-08-23 Coreoptics Inc AMPLITUDE DETECTION FOR CONTROLLING THE TIME OF SAMPLING DECISION IN THE FORM OF A DATA STREAM
UA77621C2 (en) * 2006-09-21 2006-12-15 Method for transmitting digital data analog communication facilities

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128342A (en) * 1961-06-28 1964-04-07 Bell Telephone Labor Inc Phase-modulation transmitter
US3305636A (en) * 1963-05-14 1967-02-21 James E Webb Phase-shift data transmission system having a pseudo-noise sync code modulated with the data in a single channel
FR1403768A (fr) * 1964-05-12 1965-06-25 Cit Alcatel Télégraphie à modulation trivalente
US3406343A (en) * 1965-07-01 1968-10-15 Rca Corp Pm/am multiplex communication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163321A (en) * 1981-12-28 1986-02-19 Lmt Radio Professionelle Interrogation signals

Also Published As

Publication number Publication date
FR2074929A5 (enrdf_load_stackoverflow) 1971-10-08
CA920239A (en) 1973-01-30
CH521693A (de) 1972-04-15
DE2056670A1 (de) 1971-05-27
DE2056670B2 (de) 1979-06-13
SE375897B (enrdf_load_stackoverflow) 1975-04-28
US3619503A (en) 1971-11-09

Similar Documents

Publication Publication Date Title
GB1301337A (enrdf_load_stackoverflow)
GB1327496A (en) Data transmission
ES406938A1 (es) Sistema de modulacion de impulsos codificada de nivel mul- tiple.
US2392546A (en) Pulse modulation receiver
GB1380651A (en) Transversal equalizers
GB1249364A (en) Data transmission
GB1041765A (en) Method and apparatus for the transmission of intelligence
US4841301A (en) Device operable like an automatic level control circuit for decoding a multivalued signal
US4047108A (en) Digital transmission system for transmitting speech signals at a low bit rate, and transmission for use in such a system
GB1272975A (en) Communication system with reduced fading sensitivity
US2521733A (en) Pulse code modulator
ES294582A1 (es) Un sistema de transmisiën de informaciën de portadora parcialmente suprimida
GB1107020A (en) Multiplex communication system
US2464607A (en) Pulse code modulation communication system
GB1136882A (en) Pm/am multiplex communication
US3497624A (en) Continuously compounded delta modulation
US3657653A (en) Pulse code modulation system
US3459892A (en) Digital data transmission system wherein a binary level is represented by a change in the amplitude of the transmitted signal
GB1250993A (enrdf_load_stackoverflow)
US3490045A (en) Pulse modulation transmission system with reduced quantizing noise during abrupt input level transitions
GB1107177A (en) Improvements relating to fm communications
US3801911A (en) Synchronous fm-modem
US3461244A (en) Delta modulation system with continuously variable compander
US3401342A (en) Suppressed carrier transmission system for multilevel amplitude modulated data signals
GB1519607A (en) Digital control of a loudspeaking telephone system

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years